Ski: 2012 Ski Logik Rockstar: I don't remember all of the details, but it has a 117mm waist, substantial rocker tip and tail, and short (around 110cm) flat camber section underfoot. Rocker is fairly tall.
Length Skied: 179cm Flex of the ski: stiff (as warned by the guys at the booth)
Conditions: 4,000 vertical feet (2 runs): Crud, a bit of soft uncut 6" deep snow, some firm bumps, high speed groomers, a narrow chute.
Tester: 5 foot 9, 155lbs, ski 30-40 days a year, solid skier, skiing typically fast, can ski most anything on the mountain, prefer challenging steeper off-piste terrain, OK and improving in bumps.
This ski is a pretty stout ski; it may have a lot of rocker (looks to be on the order of 40cm both tip and tail), it has a fairly beefy layup. The rocker profile is mid-rise. Not as tall as the Super 7 I demoed that day, but taller than the Kastle and Blizzard low-rise rocker. I was told it "skis long" and is pretty stout by the guys at the booth.
Crud and new snow: in soft crud, this is quite a ski. It really has a high speed limit, and mows through the soft snow. The tip is quite stiff and somewhat unforgiving: it doesn't absorb terrain all that well, but more or less just blows through crap. Not a bouncy, floaty ski like an S7 or a Bent. It skis a bit long for a relatively short 179cm, and felt like a bigger radius ski than I had expected. It likes to be tipped up onto edge and responds well to skier input. It also holds it's line well in soft snow, not getting washed out like, say a 2010 Gotama. It was a touch bouncy in crud, probably due to the shorter underfoot profile than some, but then again, the stiff tip really transmits back to the skier; as long as I was on it, it wasn't an issue. In the soft and uncut snow, I could ski it aggressively, I could be active with my feet, pulling them back at the top of the turn to tighten up the radius, and the ski allowed me to do so very well; it has a progressive flex in the shovel. This ski, as expected, loved soft snow; a real treat in steeps as well. With the pretty aggressively rockered tail, I couldn't load up the tail as much as I would have liked in a steep chute, as I would tend to lose the tail a bit. In soft snow, not an issue, but the bite wasn't quite there as on the MX108. It however, well exceeded that of the S7. This is also a quick ski in tight spaces, especially edge to edge. Overall, felt like the Ullr's Chariot I also skied, but much more suited to soft snow and crud, and more fun. Also, perhaps a bit more expert-level in terms of performance and suitable ability.
Bumps: short running length underfoot and stiffish flex didn't lend itself well to bump skiing. The width wasn't as much an issue as the profile: it just felt a bit like skiing on metal pan in bumps. A little scary. I would have liked some softer, fresh snow bumps to try it in; these were firm and icy.
Groomers; gets you back to the lift. As this really isn't a funshape, and it has no camber underfoot, it isn't really built for that terrain. Dull, no energy, skis short; no real surprise.
MX108: the Kastle had more bite on the steeps and scraped off snow, and a bit higher speed limit as well. The Rockstar felt a bit quicker when active with the feet, you really could load up the tip and work the tail easily. Kastle is softer at the tip as well.
S7: somewhat similar profile to the Rockstar, much softer and more suited to less aggressive skiers. The Rockstar is more of a power ski, stiffer tail, and doesn't really like back seat driving. The S7 lets you get away with more, comes across as more relaxed, but doesn't bite or have the quickness like the Rockstar does.
Bottom line: a very versatile soft snow ski, well suited to steeps, fast skiing, and good skiers. I would perfer less (or lower rise) tail rocker for a bit more bite in mixed conditions; the tip felt just about right for aggressive skiing in soft snow. Overall, a lot of fun and an enjoyable ski.